Syringe.



' PATENTED JUNE 9, 1903.

F. M. BAKER. SYRINGE.

APPLIOATIDH FILED JUNE 18, 1902.

I) MODEL.

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UNITED STATES.

Patented June 9, 1903.

PATENT OFFICE.

SYRINYG E.

SPECIFIGATION forming part of Letters Patent N 0. 730,596, dated June 9,1903. Application filed June 18, 1902. Serial No. 112,192. (lilo model.)

To all whom it may concern:

Be it known that I, FRANCIS M. BAKER, a citizen of the United States,and a resident of Fond du Lac, in the county of Fond du Lac and State ofWisconsin, have invented a new and Improved Syringe, of which thefollowing is a full, clear, and exact description.

This invention relates to a syringe especially intended for edectinghypodermic and other like injections under the skin of persons.

The prime object of the invention is to so construct the device that theproper surgical cleanliness will be insured, thus avoiding allpossibility of the presence of poisonous foreign matter. This end Iattain by constructing a receiver in which the injection is placed,

said receiver being hermetically sealed in the laboratory and formedwith friable portions capable of being broken away when the injection isto be made. This receiver has fitted to one of its friable portions abulb or other means for forcinga current of air, and this bulb has ayielding or flexible portion which facilitates fracturing the receptaclewithout exposing the fractured portion to the atmosphere. 0n the otherfriable portion of the receiver a needle is placed through the medium ofa flexible tube orlike object, which not only connects the needle withthe receiver containing the liquid to be injected, but also enables thesaid second friable portion of the receiver to be broken withoutexposing the broken portion to the atmosphere. This device will beconstructed and assembled in the laboratory and placed in a sterilizedpackage, where it is kept until used. It should then be taken from thepackage, the needle inserted under the skin of the patient, and the twofriable portionsof the receiver fractured, after which upon operatingthe bulb or other means for forcing air the liquid may be ejectedwithout having been at any time exposed to the atmosphere or in contactwith the operators fingers.

This specification is an exact description of one example of myinvention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both views.

Figure 1 is a sectional view of the syringe complete, and Fig. 2 is asectional view of the receiver before being fractured.

The receiver is indicated at a and is pref erably constructed of glassor other like material. it indicates the reduced end portions thereof,and these are'adapted to be broken, as above described. If desired, theymay be slightly weakened by a file-mark; but this is not essential. Thisreceiver should be constructed in the laboratory,and the substanceforming the injection should be placed therein during the constructionof the receiver and the receiver hermetically sealed, as shown in Fig.2. At one end of the receiver is located abulb b or any other meanswhich may be desired for forcing a current of air. This bulb has acontracted portion or neck b, formed of soft flexible rubber, which isfitted tightly around the end portion of the receiver a. In this neckand-surrounding the adjacent frangible portion a isa mass cof steril-,ized cotton or other material capable of filtering the air which passesthrough it. The bulb b is provided with a removable stopper 17 At theother end of the receiver is arranged the hypodermic needle (1, with thehead of which is connected a tube 6, of soft rubber or like material.This tube is fitted tightly over the end of the receiver and inclosesthe second frangible portion 0'. thereof. In the tube 6 and surroundingsaid second frangible portion a. of the receiver is a mass 0 ofsterilized cotton or like material, the same as the mass 0.

As will be seen from Fig. l, the flexible necks b and e do not engagethe friable portions of my syringe, but engage the larger reducedportions thereof, This makes the syrin go much stronger and more easilyhandled and much less liable to accidental breakage than if said neckswere secured to the friable portions just referred to.

The syringe when assembled will appear as in Fig. 1, excepting thattheportions ct of the receiver will not be fractured. It is preferred topack the syringe thus assembled in a sterilized case, in which it shouldbe kept until used. Then theneedle is inserted under the skin, andthesurgeon by bending the parts I) and e may fracture the ends a, of thereceiver. Then by pressing the bulb b a volume of air will pass into theupper end of the receiver and force the liquid out through the jection.

lower end of the needle, thus effecting the in- If the bulb should notcontain sufficient air to complete the operation, the stopper b may beremoved and a second volume of air admitted into the bulb, after whichthe opening in the bulb may be closed by the thumb of the operator orthe stopper b may be removed and a second volume of air admitted intothe bulb, after which the opening in the bulb may be closed by the thumbor finger of the operator or the stopper may be replaced and the bulbagain compressed. In this case the atmospheric air introduced into thebulb will be filtered and sterilized by its passage through the mass 0.be observed, therefore, that by means of this invention an injection maybe effected without exposing the material injected at any time, and ifthe syringe is properly assembled in the laboratory it is clear that thepresence of disease-breeding bacteria will be absolutely avoided.

Various changes in the form and details of my invention may be resortedto at will without departing from the spirit of my invention. Hence Iconsider myself entitled to all forms of the invention as may lie withinthe intent of my claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A syringe, comprising areservoir having a friableportion, a syringe outlet-pipe, a connection between the reservoir andsaid syringe-pipe, said connection being flexible, for the purposespecified, and inclosing the friable portion of the reservoir, theexternal diameter of said friable portion being smaller than theinternal diameter of said flexible connection and a filtering materialsurrounding said friable portion of the reservoir and located within thesaid connection.

2. A syringe, comprising a reservoir having at each end a friableportion of reduced diameter, a needle, a flexible tube connecting theneedle and one end of the reservoir above its friable portion, said tubeinclosing the friable portion, a bulb, said bulb having a flexibletubular stem connected with the other end of the reservoir above thefriable portion at that end and inclosing the same, and filteringmaterial surrounding each friable portion of the reservoir.

3. A reservoir for syringes, said reservoir being hermetically sealedand having at each end a friable portion and filtering material aroundeach of said friable portions, for the purpose specified.

4. A syringe having a reservoir containing a portion of fluid to beinjected hypodermically, said fluid being hermetically sealed withinsaid reservoir; said reservoir terminating at each end in a reducedfriable portion; a

It will yielding bulb for one end of the reservoir and a hypodermicneedle for the other end; said needle and bulb being each directlyconnected with their respective ends of the reservoir by flexible neckswhich surround said reduced portions and engage the respective ends ofthe reservoir above said portions, leaving a cavity Within each neckinto which cavity one of the said reduced portions is centrallyprojected with a space intervening between its sides and the surroundingflexible neck, and between its end and the inlet-opening of the needleat one end of the reservoir, and between the end of the other reducedportion and the bulb, at the other end of the reservoir; and filteringmaterial within said cavities surrounding the sides and ends of saidfriable portions and in direct contact therewith and filling the spacein one of the necks between the end of the friable portion and theopening at the inner end of the needle and in the other neck filling thespace between the end of the friable portion and the bulb, as specifiedand for the purpose set forth.

5. A syringe, com prisinga reservoir having a reduced friable portion ateach end thereof, a bulb at one end of the reservoir, a neck connectingthe bulb with one end of the reservoir, said neck surrounding theadjacent friable portion, filtering material within said neck and in contact with the said friable portion, a needle at the opposite end of thereservoir, a flexible neck connecting the needle with the reservoir atthat end and inclosing the adjacent friable portion of the reservoir,and filtering material within said neck and in direct contact with saidfriable portion surrounded thereby, as specified and for the purpose setforth.

6. A syringe, comprising a reservoir terminating at each end in areduced friable portion, a needle, a flexible tube connecting the needleand one end of the reservoir, said tube inclosing the adjacent friableportion, a bulb, said bulb having a flexible tubular stem engaging theother end of the'reservoir and inclosing its friable portion, filteringmaterial inclosed Within the flexible tube which connects the needle andone of the reduced ends of the reservoir, said filtering materialsurrounding and in contact with the friable portion of the reservoiradjacent said tube, whereby the fiuid within the reservoir is filteredas it passes from the reservoir to the needle, as specified and for thepurpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses FRANCIS M. BAKER.

Witnesses:

L. L. HOLFORD, W. E. GIBSON.

